package com.ruoyi.common.utils;

import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.text.Convert;
import com.ruoyi.common.utils.cookie.CookieUtils;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

/**
 * 客户端工具类
 * 
 * @author ruoyi
 */
public class ServletUtils
{
    /**
     * 获取String参数
     */
    public static String getParameter(String name)
    {
        return getRequest().getParameter(name);
    }

    /**
     * 获取String参数
     */
    public static String getParameter(String name, String defaultValue)
    {
        return Convert.toStr(getRequest().getParameter(name), defaultValue);
    }

    /**
     * 获取Integer参数
     */
    public static Integer getParameterToInt(String name)
    {
        return Convert.toInt(getRequest().getParameter(name));
    }

    /**
     * 获取Integer参数
     */
    public static Integer getParameterToInt(String name, Integer defaultValue)
    {
        return Convert.toInt(getRequest().getParameter(name), defaultValue);
    }

    /**
     * 获取request
     */
    public static HttpServletRequest getRequest()
    {
        return getRequestAttributes().getRequest();
    }

    /**
     * 获取response
     */
    public static HttpServletResponse getResponse()
    {
        return getRequestAttributes().getResponse();
    }

    /**
     * 获取session
     */
    public static HttpSession getSession()
    {
        return getRequest().getSession();
    }

    public static ServletRequestAttributes getRequestAttributes()
    {
        RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
        return (ServletRequestAttributes) attributes;
    }

    /**
     * 将字符串渲染到客户端
     * 
     * @param response 渲染对象
     * @param string 待渲染的字符串
     * @return null
     */
    public static String renderString(HttpServletResponse response, String string)
    {
        try
        {
            response.setContentType("application/json");
            response.setCharacterEncoding("utf-8");
            response.getWriter().print(string);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 是否是Ajax异步请求
     * 
     * @param request
     */
    public static boolean isAjaxRequest(HttpServletRequest request)
    {
        String accept = request.getHeader("accept");
        if (accept != null && accept.indexOf("application/json") != -1)
        {
            return true;
        }

        String xRequestedWith = request.getHeader("X-Requested-With");
        if (xRequestedWith != null && xRequestedWith.indexOf("XMLHttpRequest") != -1)
        {
            return true;
        }

        String uri = request.getRequestURI();
        if (StringUtils.inStringIgnoreCase(uri, ".json", ".xml"))
        {
            return true;
        }

        String ajax = request.getParameter("__ajax");
        if (StringUtils.inStringIgnoreCase(ajax, "json", "xml"))
        {
            return true;
        }
        return false;
    }

    /**
     * 登录成功后设置cookie
     * @param username
     * @param password
     * @param rememberMe
     */
    public static void setLoginCookie(String username, String password, Boolean rememberMe){
        HttpServletResponse response= ServletUtils.getResponse();
        response.setHeader("Access-Control-Allow-Credentials","true");
        CookieUtils.setCookie(response, Constants.ADMIN_COOKIE_USERNAME, username, Constants.SECONDS_7_DAYS);
        if (rememberMe) {//记住密码
            CookieUtils.setCookie(response, Constants.ADMIN_COOKIE_PASSWORD, password, Constants.SECONDS_7_DAYS);
            CookieUtils.setCookie(response, Constants.ADMIN_COOKIE_REMEMBERME, "1", Constants.SECONDS_7_DAYS);
        } else {
            CookieUtils.setCookie(response, Constants.ADMIN_COOKIE_PASSWORD, password,0);//0表示清除Cookie
            CookieUtils.setCookie(response, Constants.ADMIN_COOKIE_REMEMBERME, "0", Constants.SECONDS_7_DAYS);
        }
    }

    public static Map<String, String> getMap(HttpServletRequest req) {
        Map<String, String> map=new HashMap<String, String>();
        Enumeration enu = req.getParameterNames();
        while(enu.hasMoreElements()) {
            String paramName = (String)enu.nextElement();
            String[] paramValues = req.getParameterValues(paramName);
            if (paramValues.length == 1) {
                String paramValue = paramValues[0];
                if (paramValue.length() != 0) {
                    map.put(paramName, paramValue);
                }
            }
        }
        return map;
    }
}
